Vasya and Books

implementation, math

Diverse Substring

implementation, strings

Rain Protection

binary search, geometry

Algoland and Berland

constructive algorithms, divide and conquer, geometry

Odd Federalization

constructive algorithms

Video Posts

implementation

Streets and Avenues in Berhattan

dp

Privatization of Roads in Berland

flows, graph matchings, graphs

BerOS File Suggestion

brute force, implementation

Monsters and Potions

brute force, dp, greedy, implementation

Debate

greedy

Getting Deals Done

binary search, data structures

Garbage Disposal

greedy

Cloud Computing

data structures, greedy

Berkomnadzor

data structures, greedy

Find a Number

dp, graphs, number theory, shortest paths

Colored Rooks

constructive algorithms, graphs

LCM

math, number theory

Birthday

math

Random Forest Rank

dp, graph matchings, math, trees

Computer Game

dp, greedy, math, probabilities

Knights

constructive algorithms

Multihedgehog

dfs and similar, graphs, shortest paths

Array Without Local Maximums

dp

Yet another 2D Walking

dp

Binary Numbers AND Sum

data structures, implementation, math

Boxes Packing

binary search, implementation

Books Queries

implementation

Heaters

greedy, two pointers

Vova and Train

math

Fibonacci Suffix

strings

Up and Down the Tree

dfs and similar, dp, trees

Side Transmutations

combinatorics, strings

Three Pieces

dfs and similar, dp, shortest paths

Make It Equal

greedy

Vasya and Isolated Vertices

constructive algorithms, graphs

Vasya and Chocolate

implementation, math

Equations of Mathematical Magic

math

Make a triangle!

brute force, geometry, math

String Journey

data structures, dp, string suffix structures

Lasers and Mirrors

constructive algorithms, math

Candies for Children

brute force, math

Dwarves, Hats and Extrasensory Abilities

binary search, constructive algorithms, geometry, interactive

Labyrinth

graphs, shortest paths

Oh Those Palindromes

constructive algorithms, strings

Upgrading Cities

dfs and similar, graphs

Company

binary search, data structures, dfs and similar, greedy, trees

Fun with Integers

dfs and similar, graphs, implementation, math

Banh-mi

greedy, implementation, math

Math

greedy, math, number theory

A Prank

greedy, implementation

Lost Root

interactive, probabilities

Politics

flows, graphs

TV Shows

data structures, greedy, implementation, sortings

Multiplicity

data structures, dp, implementation, math, number theory

Views Matter

greedy, implementation, sortings

Coins

greedy, implementation, math

Sophisticated Device

constructive algorithms

Balls and Pockets

data structures

Shrinking Tree

combinatorics, dp

Sergey and Subway

dfs and similar, dp, trees

Social Circles

greedy, math

Maximum Subrectangle

binary search, implementation, two pointers

Maximum Sum of Digits

greedy

Phone Numbers

brute force

Split the Tree

binary search, data structures, dp, greedy, trees

Nature Reserve

binary search, geometry, ternary search

Sequence Transformation

constructive algorithms, math

Forgery

implementation

Cashier

implementation

Tanya and Colored Candies

*special problem, dp

DDoS

*special problem, brute force

Bmail Computer Network

*special problem, dfs and similar, trees

Detect Robots

data structures, strings

Take Metro

brute force, data structures, graphs

Write The Contest

binary search, dp, math

Check Transcription

brute force, data structures, hashing, strings

Decorate Apple Tree

constructive algorithms, dfs and similar, dp, graphs, greedy, sortings, trees

Pick Heroes

greedy, implementation, interactive, sortings

Divide Candies

math, number theory

Determine Line

implementation

Jellyfish Nightmare

Tree and XOR

strings, trees

Segments on the Line

binary search, dp

Refactoring

greedy, implementation, strings

Lucky Days

math, number theory

Alice and Hairdresser

dsu, implementation

Metro

graphs

Epic Convolution

chinese remainder theorem, fft, math, number theory

New Road Network

constructive algorithms, greedy, math

Electric Scheme

flows, graph matchings

Chips Puzzle

constructive algorithms, implementation, math

Changing Array

greedy, implementation

Candies Distribution

constructive algorithms, implementation

Appending Mex

implementation

Elevator or Stairs?

implementation

Euler tour

constructive algorithms, trees

Distinctification

data structures, dsu, greedy

The Shortest Statement

graphs, shortest paths, trees

Vasya and Big Integers

binary search, data structures, dp, hashing, strings